A replaceable cylindrical item designed to provide wear surface and maintain alignment of a reciprocating valve stem and the like, it may have a flange(s) and/or grooves.
NSN 5960-00-938-7569
NSN 5915-00-154-3984
NSN 5965-01-110-9102
NSN 6620-01-594-6311
NSN 5999-01-440-9392
NSN 6105-01-444-3418
NSN 6320-01-431-4359
NSN 5925-01-159-6614
NSN 5835-00-632-8621
NSN 5998-01-524-2619
NSN 5905-00-891-4255
NSN 5996-00-107-5357